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# frozen_string_literal: true
class KeysFinder
InvalidFingerprint = Class.new(StandardError)
GitLabAccessDeniedError = Class.new(StandardError)
FINGERPRINT_ATTRIBUTES = {
'sha256' => 'fingerprint_sha256',
'md5' => 'fingerprint'
}.freeze
def initialize(current_user, params)
@current_user = current_user
@params = params
end
def execute
raise GitLabAccessDeniedError unless current_user.admin?
raise InvalidFingerprint unless valid_fingerprint_param?
Key.where(fingerprint_query).first # rubocop: disable CodeReuse/ActiveRecord
end
private
attr_reader :current_user, :params
def valid_fingerprint_param?
if fingerprint_type == "sha256"
Base64.decode64(fingerprint).length == 32
else
fingerprint =~ /^(\h{2}:){15}\h{2}/
end
end
def fingerprint_query
fingerprint_attribute = FINGERPRINT_ATTRIBUTES[fingerprint_type]
Key.arel_table[fingerprint_attribute].eq(fingerprint)
end
def fingerprint_type
if params[:fingerprint].start_with?(/sha256:|SHA256:/)
"sha256"
else
"md5"
end
end
def fingerprint
if fingerprint_type == "sha256"
params[:fingerprint].gsub(/sha256:|SHA256:/, "")
else
params[:fingerprint]
end
end
end
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